ISO 5151-2017 PDF

Full title and description

ISO 5151:2017 — Non-ducted air conditioners and heat pumps — Testing and rating for performance. This International Standard specifies standard rating conditions, test methods and procedures for determining capacity and efficiency ratings of air-cooled non-ducted air conditioners and air-to-air heat pumps (single-package and split systems), and for certain small ducted units.

Abstract

ISO 5151:2017 defines performance testing, standard rating conditions and test methods used to determine cooling/heating capacity and efficiency of factory-made, electrically driven, mechanically compressed, air-cooled non-ducted air conditioners and air-to-air heat pumps (including multiple and variable-capacity designs). It identifies applicable equipment types, standard indoor/outdoor test conditions (including climate designations), required airflow and instrumentation practices, and lists equipment and test situations outside its scope.

General information

• Status: Published (International Standard).
• Publication date: July 2017.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 23.120; 27.080.
• Edition / version: Edition 3 (ISO 5151:2017); amended by ISO 5151:2017/Amd 1:2020.
• Number of pages: 74 pages.

Scope

Applies to non-ducted air-cooled air conditioners and non-ducted air-to-air heat pumps, and to ducted units rated below ~8 kW intended to operate at low external static pressures. Covers residential, commercial and industrial single-package and split systems driven by mechanical vapor-compression. Excludes water-source or water-cooled systems, multi‑split systems (see ISO 15042), most ducted equipment (see ISO 13253), mobile/windowless units with condenser exhaust ducts, absorption-cycle equipment, and tests for seasonal (annual) efficiency metrics. The standard is intended for matched‑assembly ratings.

Key topics and requirements

• Definition of standard rating conditions (indoor/outdoor temperatures, humidity / enthalpy) and climate designation types for rating (e.g., T1/T2/T3 classifications).
• Detailed test methods for measuring cooling/heating capacity and seasonal performance inputs (instantaneous COP/EER/IEER style metrics are covered; seasonal calculations are not within the standard).
• Requirements for airflow measurement and control (indoor-side air quantity, static pressure conditions and adjustments for barometric pressure).
• Instrumentation, test setup and tolerances, including arrangements for split and multiple‑compressor systems and variable‑capacity equipment.
• Marking and nameplate information related to designated type(s) and rated capacities under the specified standard conditions.
• List of explicit exclusions and references to complementary standards for excluded equipment types (notably ISO 15042 for multi‑split systems and ISO 13253 for ducted testing).

Typical use and users

Used by HVAC manufacturers for product rating and nameplate data, test laboratories and conformity assessment bodies for type‑approval and verification, certification schemes and regulatory agencies for compliance and labeling, and design engineers and energy consultants who require standardized capacity and efficiency data for equipment selection and comparison.

Related standards

Standards and documents commonly referenced alongside ISO 5151 include ISO 15042 (testing of multi‑split systems), ISO 13253 (ducted equipment testing methods) and national/regional rating standards and test methods used for regulatory energy labeling. ISO 5151:2017 is published with an amendment: ISO 5151:2017/Amd 1:2020.

Keywords

air conditioner, heat pump, non‑ducted, testing, rating, performance, capacity, efficiency, EER, COP, airflow, test method, ISO 5151, HVAC.

FAQ

Q: What is this standard?

A: ISO 5151:2017 is an International Standard that specifies testing and rating procedures for air‑cooled non‑ducted air conditioners and air‑to‑air heat pumps to determine capacity and efficiency under defined standard conditions.

Q: What does it cover?

A: It covers factory‑made, electrically driven mechanical compression non‑ducted units (single‑package and split systems), standard test conditions, instrumentation, airflow requirements and procedures to determine rated cooling/heating capacity and efficiency. It does not cover seasonal indexing or certain equipment types such as water‑cooled units, absorption systems or most ducted or multi‑split configurations.

Q: Who typically uses it?

A: Manufacturers, independent test laboratories, certification/approval bodies, regulators, HVAC design engineers and energy auditors use ISO 5151 for consistent, comparable performance ratings and for product conformity testing.

Q: Is it current or superseded?

A: ISO 5151:2017 is the current edition published in July 2017 (Edition 3) and has been amended by ISO 5151:2017/Amd 1:2020. The standard is maintained by ISO technical committee ISO/TC 86/SC 6 and subject to the ISO review cycle.

Q: Is it part of a series?

A: It is part of the body of HVAC testing and rating standards; related ISO standards address multi‑split systems (ISO 15042), ducted equipment testing (ISO 13253) and other complementary test or labeling documents used in regional regulations and certification programs.

Q: What are the key keywords?

A: air conditioner, heat pump, non‑ducted, testing, rating, capacity, efficiency, airflow, test method, ISO 5151.